Glass supplier PPG Industries has published "A Comparison of Energy, Economic and Environmental Benefits of Tinted Low-E Glasses," a white paper summarizing a comparative analysis of four commonly specified tinted, low-emissivity (low-E) glasses. The paper reviews a study conducted by the Architectural Energy Corporation that compared the energy-saving performance of Solarban z50 glass by PPG to three common architectural glazings: dual-pane tinted glass, pyrolytic low-E tinted glass, and Magnetron Sputtering Vacuum Deposition low-E tinted glass.

The study showed that Solarban z50 glass can reduce annual energy consumption in a standard glass-walled, eight-story office building by up to 10 percent, or more than $60,000, when specified instead of dual-pane tinted glass.

A copy of the white paper can be ordered through PPG's Web site:, or by calling 888-774-4332.